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An Effect on Fisheries Resources Enhancement of Hollow Jumbo Structure and a Search for Artificial Reefs by Side Scan Sonar in the Western Sea of Korea

서해연안 잠보형 인공어초 어장에서의 수산자원 조성효과와 사이드스캔 소너에 의한 인공어초 상태조사

  • 박해훈 (서해수산연구소) ;
  • 신종근 (서해수산연구소) ;
  • 김재오 (국립수산과학원) ;
  • 박승윤 (서해수산연구소) ;
  • 김호상 (국립수산과학원) ;
  • 임동현 (서해수산연구소) ;
  • 박영철 (국립수산과학원) ;
  • 조성환 (남해수산연구소) ;
  • 홍승현 (서해수산연구소)
  • Published : 2003.08.01

Abstract

An effect on the enhancing production of hollow 'jumbo' structures and the condition of artificial reefs (dice and hollow jumbo structure) by side scan sonar were described. The experiment of the capture of fish in the jumbo structures and control site (non-artificial site) by trammel net and traps was done twice every year from 1998 to 2000. The relative catches by trammel net between in the jumbo structure and in the control site was significantly different in number and in weight at 5% level and also that by traps significantly different in weight. The t-test of the catch of finespotted flounder showed that the hollow jumbo structure was regarded as a breeding field because the average size of the flounder in the jumbo site was smaller than that in the control site. The search on the condition of the artificial reefs (dice and hollow jumbo structure) was performed by side scanning sonar which showed various phase of it such as accumulated, dispersed, scouring and partly buried. The result implied that in the area of sand bottom with strong tide like the western sea of Korea, the current criterion for constructing artificial reef should be modified because of the sand moving on the bottom.

Keywords

artificial reef;side scan sonar;trammel net;traps;fisheries resources enhancement

References

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